2f000a78bf
This should have no real effect in most cases, as e.g. `hidden`
visibility already implies `dso_local` (or at least LLVM IR does not
preserve the `dso_local` setting if the item is already `hidden`), but
it should fix `-Crelocation-model=static` and improve codegen in
executables.
Note that this PR does not exhaustively port the logic in [clang]. Only
the obviously correct portion and what is necessary to fix a regression
from LLVM 12 that relates to `-Crelocation_model=static`.
Fixes #83335
[clang]: 3001d080c8/clang/lib/CodeGen/CodeGenModule.cpp (L945-L1039)
20 lines
508 B
Rust
20 lines
508 B
Rust
// no-system-llvm
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// compile-flags: -Coverflow-checks=no -O
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// revisions: YES NO
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// [YES]compile-flags: -Zfewer-names=yes
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// [NO] compile-flags: -Zfewer-names=no
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#![crate_type = "lib"]
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#[no_mangle]
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pub fn sum(x: u32, y: u32) -> u32 {
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// YES-LABEL: define{{.*}}i32 @sum(i32 %0, i32 %1)
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// YES-NEXT: %3 = add i32 %1, %0
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// YES-NEXT: ret i32 %3
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// NO-LABEL: define{{.*}}i32 @sum(i32 %x, i32 %y)
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// NO-NEXT: start:
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// NO-NEXT: %z = add i32 %y, %x
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// NO-NEXT: ret i32 %z
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let z = x + y;
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z
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}
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